JSFiddle - React, Tailwind, and code Playground

by joshmoto

HTML

<script src="//code.jquery.com/jquery-3.3.1.slim.min.js"></script>
<link rel="stylesheet" href="//stackpath.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css">
<script src="//cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.0/umd/popper.min.js"></script>
<script src="//stackpath.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">

<div class="d-flex align-items-center h-100">
  <div class="container">
    <div class="col-12 text-center">
      
      <div class="btn-group">
        <button class="btn btn-primary btn-demo" type="button">
          Long demo button title for testing
        </button>
        <div class="dropdown-menu"></div>
      </div>
      
    </div>
  </div>
</div>

SCSS

HTML,
BODY {
  height: 100%;
  min-height: 100%;
  cursor: crosshair;
  width: 100%;
}

BUTTON {
  cursor: crosshair !important;
}

.btn-group {
  position: relative;
  display: inline-flex;
  vertical-align: middle;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 1000;
  display: none;
  float: left;
  min-width: 0;
  transform: translate(-50%,-50%);
}

JavaScript

// demo button click event
$('.btn-demo').on('click', function(e) {
	
  // get the next element matching .dropdown-menu
	var $dropdown_menu = $(this).next('.dropdown-menu');
	
  // your custom button or add these however method you are doing
  var btn_1 = '<button class="dropdown-item" type="button">Button 1</button>';
  var btn_2 = '<button class="dropdown-item" type="button">Button 2</button>';
  var btn_3 = '<button class="dropdown-item" type="button">Button 3</button>';
  
  // add the desired buttons to the .dropdown-menu on click
  $dropdown_menu.html(btn_1 + btn_2 + btn_3);
  
  // add this css to .dropdown-menu menu on click
  $dropdown_menu.css({
  
    //  top postion: cursor click postion minus .btn-demo top-offset position
    top: (e.pageY - $(this).offset().top),
  	
    // left postion: cursor click postion minus .btn-demo left-offset position
    left: (e.pageX - $(this).offset().left),
    
    // display block to reveal the .dropdown-menu or use .show() function
    // display: 'block'
    
  }).show();

});